Work-support for cutting-machines.



(I. T. HENDERSON. WORK SUPPORT FOR CUTTING MACHINES. APPLICATION FILED AUG-8. I9I4.

20 as I UNITED strarns PATENT OFFICE.

CLARK T. HENDERSON, OF MILWAUKEE, WISCONSIN, ASSIGNOB TO THE CUTLER- HAMMER MFG. 00., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CONSIIN.

To all whom it may concern: Be it known that I, OLA a citizen of the United Milwaukee, in the county of 5 State of Wisconsin, have invented new and useful Improvements in Work-Supports for Cutting-Machines, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification. This invention relates to machines for More particularly the invention relates to an improved work support for such machinery which is adapted to clamp the material thereon in accordance with the position of other parts of shearing steel products.

the mechanism.

The primary object of to provide safety means for such devices for preventing manipulation of thematerial to' be out after the shearing descend whereby danger o w orknien is reduced.

Other objects and-advantages will appear cription of ion schematically hereinafter from the des bodiment of the invent shown in the accompanying drawing, which represents a shearing machine for-steel mill work together with a circui for controlling a part thereof.

The cutting machine as represented comblade 1 fixed to a 0 adapted to reciprocate in a gui toward and from a work table 4 which supports the material to be prises a a steel plate 5.

by a link 6 with an op cam 7 on a driven shaft 8. device (not shown) is provi driving connection between the power supply and the driven shaft 8. This clutch is of a type wherein the driv maintained during only one reciprocation of the cutting blade and is arranged to'be actuated by a foot pedal pedal 9 is depressed the blade 1 is driven to cutting position and returned to tion, and then the driving co tomatically interrupted so t remains elevated until the clutch is again moved.

T. Hnnnniison, tates, residing at Milwaukee and the invention is blade starts to f injury to the t arrangement cut, for example, The carrier 2 is connected crating eccentric A suitable clutch ded to establish ing connection is nnection is aul)lt\( hat the blade provided with a energized at each onnection with ized when the WORK-SUPPORT FOR CUTTING-MACHINES.

Application filed August 8, 1914. Serial No. 855.825.

blade 1 has passed'cutting position. arrangement for accomplishing this result comprises a switch 11 adapted to complete the circuit of the winding 10 by depression of the pedal 9 and automatically actuated to interrupt the winding circuit by means associated with the shaft 8 for operation accordance with a predetermined position of the blade 1 As shown, the switch is fixed on a spindle 29 which also has fixed thereon a ratchet wheel 12 adapted for operation by a pawl 13 on a lever 14 and by a pawl 15 on an independent lever 16. The lever ll is connected for actuation by the clutch pedal 9 and is raised to normal position by a spring 17. The lever 16 is provided with a roller 18 riding on a cam 19 on the shaft 8 in an arrangement so that the pawl 15 is inovedto open the switch when the blade 1 ready for its return 0 upper position. The circuit diagram illustrated is simple and obvious. The winding 10 is connected ,to a line 20 byconductor 21, and by conductor 22 to a switch contact 23 and thence through the switch and contact 24 by con ductor 25 to the other line 26. The winding is also connected with line 26 by a conductor 27 and hand switch 28 for independent closure of the winding circuit. As above mentioned, the winding is 'energized when arrier 2 and the clutch pedal 9 is depressed so that the ding frame 3 work table is thereupon magnetized and rial 5 to be cut. Manual positioning of the material 5 is thus prevented after the drive of the cutting blade 1 is coinnienced,an the material is maintained clamped to the support until the cutting operation has been completed. Dei nergization of the winding 10 and release of the plate 5 is thereupon accomplished by automatic interruption of the winding circuit through operation of the switch 11 by the lever 16. The plate 5 may then be freely manipulated and positioned until depression on the clutch pedal 9 again establishes the drive of the cutting le and simultaneously effects the magnetization of the work support 4.

Vhat I claim as new and desire to secure by Letters Patent is:

\Vhen the initial posi' associated therewith to secure work thereto, a cutting device to operate upon the work has completed its cutting operation and is firmly attracts thereto the magnetic matter, 7

1. In combination, a work support. means One carried by said support and means to estab 1N lish a driving connection for said device and to control said work securing means to insure action thereof upon establishment of such driving connection, said work securing means being controllable by said device for release of the work after cutting thereof.

2. In combination, a work support for magnetic material, electro-responsive means associated with said support for holding the material, movable means foracting upon the material, and means insuring the energization of said electro-responsive means when said movable means is actuated.

- 3. In a cuttingmachine, in combination, a support for material to be cut, a cutting device for such material arranged to be driven by power, means to establish a driving connectiontherefor, and means insuring against positioning of the material to be out after the driving connection of said device i established.

4. In a cutting machine, in combination, a support for magnetic material to be cut, a magnet winding associated with said support for holding material thereon against movement, a driven tool for cutting the material, and means to energize said magnet winding when said tool is driven toward cutting position.

5. In a cutting machine for magnetic ma terial, in combination, a support for the material, electro-responsive means associated with said support for holding the material thereon, and movable means for cutting the material but operable only after the energization of said electro-responsive means.

6. In combination, a work support, electromagnetic means for securing work to said support, a cutting device to operate upon the work carried by said support, a control member to establish a driving connection for said device and control means for said electromagnetic means operable by said member to insure inclusion of said electroma netic means in circuit upon establishment of such driving connection, said control means being further operable by said device after cutting operation to effect detinergization of said electromagnetic means for release of the work.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

CLARK T. HENDERSON.

\Vitnesses:

L. A. lVA'rsoN, TEKLA BAST. 

